Simulation methods, devices, and electronic equipment for vehicle motor phase current overcurrent

Abstract

This invention relates to a method, apparatus, and electronic device for simulating phase current overcurrent in a vehicle motor. The method includes performing a simulated current overcurrent operation based on adjusting the brake disc's closing value. During the step of performing the simulated current overcurrent operation, relevant parameters are simultaneously measured to optimize vehicle control parameters based on the measured values. These relevant parameters include at least current and temperature. When the simulated wheel enters a first airborne state, a first grounded state, a second airborne state, a third airborne state, and a third grounded state, the drive motor needs to reduce torque. Compared to existing technologies that collect data through on-road vehicle testing, this application simplifies the collection of relevant parameters, reduces the cost of parameter collection, and improves the safety of parameter collection.

Description

Technical Field

[0001] This invention relates to the technical field of vehicle current overcurrent, and more particularly to a method, apparatus, and electronic device for simulating vehicle motor phase current overcurrent. Background Technology

[0002] When a vehicle goes over a speed bump or its wheels slip, the drive motor will cause the vehicle to become airborne, and the motor speed will change instantaneously, which can easily exceed the bandwidth of the motor controller, leading to faults such as three-phase overcurrent or overtemperature. However, the existing technology lacks a method to simulate this type of vehicle airborne overcurrent fault without the vehicle being in motion. As a result, in order to obtain more data on vehicle airborne situations, it is necessary to rely on vehicle road tests to obtain the corresponding data, which makes the data collection less secure and more costly. Summary of the Invention

[0003] In order to overcome the problem that the existing technology lacks a simulation method for the current overcurrent caused by the vehicle being airborne during operation, which results in high data acquisition costs and low safety of current overcurrent, the present invention provides a simulation method, device and electronic device for vehicle motor phase current overcurrent.

[0004] In a first aspect, to solve the above-mentioned technical problems, the present invention provides a method for simulating overcurrent in a vehicle motor phase current, used to simulate overcurrent in a set scenario using a simulation device, the simulation device including a drive motor and a brake disc, and the simulation method including:

[0005] Based on the adjustment of the brake disc's closing value, a simulated current overcurrent operation is performed;

[0006] In performing the step of performing the simulated current overcurrent operation, relevant parameters are measured synchronously to optimize the vehicle's control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0007] The operation of performing simulated current overcurrent includes:

[0008] Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state;

[0009] Perform the operation with the closing value in the first interval to simulate the wheel entering its first landing state;

[0010] Perform an operation with a value of 0 to simulate the wheel entering a second landing state;

[0011] Perform the operation with the closing value in the first interval to simulate the wheel entering the second airborne state;

[0012] Perform an operation with a 100% off value to simulate the wheel entering the third airborne state;

[0013] Perform the operation with the value in the first interval to simulate the wheel entering the third landing state;

[0014] Release control of the brake disc;

[0015] Specifically, when the simulated wheel enters the first airborne state, the simulated wheel enters the first grounded state, the simulated wheel enters the second airborne state, the simulated wheel enters the third airborne state, and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

[0016] In one embodiment, prior to releasing control of the brake disc, the method further includes:

[0017] The steps of the simulated wheel entering the second landing state, the simulated wheel entering the second airborne state, the simulated wheel entering the third airborne state, and the simulated wheel entering the third landing state are executed in a loop.

[0018] In one embodiment, the operation of executing the shutdown value in the first interval includes:

[0019] Perform the operation with the brake disc closed between 30% and 70%.

[0020] In one embodiment, the simulation method includes:

[0021] The operation of simulating current overcurrent is executed cyclically, and the drive motor outputs a different speed each time the operation of simulating current overcurrent is executed.

[0022] In one embodiment, during the step of performing the simulated current overcurrent operation, the synchronous measurement of relevant parameters includes:

[0023] The DC bus voltage, motor output torque, and motor speed are measured, along with the degree of hardware damage.

[0024] In one embodiment,

[0025] The step of performing the simulated current overcurrent operation further includes determining the operating status of the simulation device, including:

[0026] If any of the current, temperature, or hardware damage exceeds its corresponding preset range, the simulation device will shut down.

[0027] In one embodiment, the simulation device includes a test bench, and prior to the step of performing the simulated current overcurrent operation based on the adjustment of the brake disc's closing value, the simulation device is further pre-set.

[0028] The pre-setting of the simulation device includes:

[0029] Install the aforementioned stand;

[0030] Establish communication between the test bench and the drive motor;

[0031] The simulation device is set up according to the corresponding test conditions.

[0032] In one embodiment, the simulation method further includes:

[0033] The motor is controlled by an applied negative torque to perform energy recovery commands and simulate current overcurrent operations.

[0034] Secondly, the present invention also provides a simulation device for phase current overcurrent, used to simulate current overcurrent occurring under a set scenario, the simulation device comprising:

[0035] The brake disc control module performs simulated current overcurrent operation based on the adjustment of the brake disc's shut-off value;

[0036] The operation of performing simulated current overcurrent includes:

[0037] Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state;

[0038] Perform the operation with the closing value in the first interval to simulate the wheel entering its first landing state;

[0039] Perform an operation with a value of 0 to simulate the wheel entering a second landing state;

[0040] Perform the operation with the closing value in the first interval to simulate the wheel entering the second airborne state;

[0041] Perform an operation with a 100% off value to simulate the wheel entering the third airborne state;

[0042] Perform the operation with the value in the first interval to simulate the wheel entering the third landing state;

[0043] Release control of the brake disc;

[0044] The acquisition module is used to synchronously measure relevant parameters during the step of performing the simulated current overcurrent operation, so as to optimize the vehicle control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0045] The drive motor control module is used to control the drive motor to reduce torque when the simulated wheel enters the first airborne state, the simulated wheel enters the first grounded state, the simulated wheel enters the second airborne state, the simulated wheel enters the third airborne state, and the simulated wheel enters the third grounded state.

[0046] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor executes the program to implement the steps of the simulation method.

[0047] The beneficial effects of this invention are: by simulating the changes in vehicle driving state caused by a vehicle going over a speed bump and / or skidding, relevant parameters of the vehicle during the airborne process can be obtained. By measuring these parameters, the results can be easily integrated into the MCU software, and the control parameters can be adjusted based on the analysis, thereby reducing the probability of motor overcurrent faults when the vehicle is airborne again. This application can collect relevant parameters through a simulation device. Compared with the existing technology of collecting data through on-road vehicle testing, the simulation method of this application simplifies the collection of relevant parameters, reduces the cost of collecting relevant parameters, and improves the safety of collecting relevant parameters. Attached Figure Description

[0048] Figure 1 This is a flowchart illustrating the simulation method for overcurrent in the vehicle motor phase current of the present invention.

[0049] Figure 2 This is a schematic diagram of the process included in step S120 of the present invention;

[0050] Figure 3 This is a schematic diagram of the process included in step S110 of the present invention;

[0051] Figure 4 This is an internal structural diagram of the computer device of the present invention;

[0052] Figure 5 This is a structural block diagram of the simulation device of the present invention;

[0053] Figure 6 This is a structural connection diagram of the simulation device of the present invention. Detailed Implementation

[0054] The following embodiments are further explanations and supplements to the present invention and do not constitute any limitation on the present invention.

[0055] In existing technologies, due to the lack of simulation of vehicle deceleration or wheel slippage causing the vehicle to become airborne, data on the resulting overcurrent can only be obtained through on-road testing. However, this method is unsafe and costly. Therefore, based on the above-mentioned shortcomings, this application proposes a method for simulating vehicle motor phase current overcurrent. This method uses a simulation device to simulate the current overcurrent scenario and collect relevant data. Embodiments of the invention are described below with reference to the accompanying drawings.

[0056] In one embodiment of this application, see Figure 1 This invention provides a method for simulating phase current overcurrent in a vehicle motor. The method uses a simulation device to simulate overcurrent occurring under a given scenario. The simulation device includes a drive motor and a brake disc. The simulation method includes:

[0057] Step S120: Perform a simulated current overcurrent operation based on the adjustment of the brake disc's closing value.

[0058] In typical vehicle operation scenarios, situations that cause a vehicle to become airborne and experience overcurrent include: the vehicle going over a speed bump, and / or the vehicle skidding. Therefore, in actual vehicle operation, the cause of a vehicle becoming airborne and experiencing overcurrent can be either only one situation, such as the vehicle going over a speed bump or the vehicle skidding; or, the cause of a vehicle becoming airborne and experiencing overcurrent can be both situations, i.e., the vehicle going over a speed bump and the vehicle skidding simultaneously.

[0059] Taking a vehicle going over a speed bump as an example, this explains why a vehicle might experience overcurrent: When a vehicle goes over a speed bump at high speed (e.g., at full throttle), due to the intermittent loss of road friction and the high electromagnetic torque, the rate of change of the motor's acceleration and deceleration is much faster than under normal driving conditions. The motor speed changes too quickly, posing a challenge to the stability of the motor controller and leading to three-phase overcurrent or overtemperature faults.

[0060] Taking vehicle slippage as an example, let's explain why a vehicle experiences overcurrent: When a vehicle slips, the friction between the wheel and the ground decreases sharply, causing the wheel to spin freely. This spinning phenomenon causes the actual load on the motor to suddenly decrease, but the output power of the motor does not decrease immediately, which may cause a momentary increase in current, i.e., overcurrent.

[0061] The primary function of ABS (Anti-lock Braking System) is to prevent wheel lock-up during braking, thereby maintaining vehicle stability and shortening braking distance. When the wheel slip ratio (the proportion of wheel slip) reaches a certain value, the ABS system intervenes and adjusts the braking pressure to prevent wheel lock-up. When going over speed bumps, if the vehicle speed is high and the speed bump is high, the vehicle may experience a momentary change in wheel contact with the ground, affecting wheel speed and slip ratio. If the wheel slip ratio and vehicle speed meet the activation conditions of the ABS system, the ABS system will activate and adjust the braking pressure to prevent wheel lock-up.

[0062] As can be seen from the principle of ABS system triggering, when the vehicle simulates speeding over speed bumps in this application, the vehicle will be airborne and the speed will be relatively high. Therefore, the airborne state of this application will trigger the ABS system. Correspondingly, in order to simulate the triggering of the vehicle's ABS system in the first airborne state and the third airborne state, the brake disc closing value is set to 100%.

[0063] Since the operation corresponding to the vehicle being airborne includes the control of the brake disc, the brake disc closing value was adjusted in the above steps to facilitate the operation corresponding to the simulation of current overcurrent.

[0064] Since the operation corresponding to the vehicle being airborne also includes synchronous control of the drive motor, in order to better simulate the scenario of "the vehicle going over a speed bump and / or the vehicle slipping", the drive motor is also adjusted synchronously when controlling the brake disc.

[0065] When a vehicle is actually in a state of "passing over a speed bump and / or skidding", it will perform multiple repeated take-off and landing operations, such as taking off and landing again. In this process, the first few take-offs and landings are most likely to cause overcurrent problems. Therefore, based on this, the following step-by-step take-off and landing simulation operation was implemented.

[0066] See Figure 2 The operation of performing the simulated current overcurrent includes:

[0067] Step S121: Perform the operation of reducing the closing value from 0 to 100% to drive the motor to reduce torque, so as to simulate the wheel entering the first airborne state.

[0068] When the vehicle enters a state of "going over a speed bump and / or slipping," it will initially become airborne. This initial airborne state corresponds to the first airborne state. During this initial airborne state, the following operations are performed on the brake discs: first, the brake discs are fully opened, and then they are fully closed; equivalent to first adjusting the brake disc's closing value to 0, and then adjusting it to 100%. Furthermore, when adjusting the brake disc's closing value, the torque of the drive motor needs to be reduced. The first airborne state corresponds to the ABS system being triggered.

[0069] Step S122: Perform the operation of closing the value in the first interval, and drive the motor to reduce torque to simulate the wheel entering the first landing state.

[0070] After the vehicle completes its initial airborne phase, it will land. This first landing state is when the vehicle just touches the ground, meaning the wheels are just making contact with the ground. When the vehicle enters this first landing state, the closing value needs to be adjusted so that it falls within the first range. The first landing state corresponds to the state where the ABS system is deactivated.

[0071] Step S123: Perform the operation with a value of 0 to simulate the wheel entering the second landing state.

[0072] After the vehicle completes its initial takeoff and landing, it enters a second landing state, which is the state where the vehicle is fully on the ground. In this state, the vehicle's wheels are in complete contact with the ground. When the vehicle enters the second landing state, the closing value needs to be adjusted to 0.

[0073] Step S124: Perform the operation of closing the value in the first interval, and drive the motor to reduce torque to simulate the wheel entering the second airborne state.

[0074] After the vehicle completes its first airborne phase, the moment it lands, and the moment it fully lands, it enters a second airborne phase. This second airborne phase is when the vehicle is airborne again and the wheels have just left the ground. In this phase, the vehicle's wheels are just off the ground. When the vehicle enters the second airborne phase, the closing value needs to be adjusted so that it falls within the first range.

[0075] In step S125, the operation of setting the shutdown value to 100% is performed, and the drive motor reduces torque to simulate the wheel entering the third airborne state.

[0076] After the vehicle completes its first airborne phase, the moment it lands, the moment it fully lands, and the moment it airborne again with its wheels just off the ground, the vehicle enters a third airborne state. This third airborne state is the state where the vehicle is completely airborne, with all the wheels off the ground. When the vehicle enters this third airborne state, the deactivation threshold needs to be adjusted to 100%. This third airborne state corresponds to the state where the ABS system is triggered.

[0077] In the embodiment, a closing value of 0 means the brake disc is fully open, and a closing value of 100% means the brake disc is fully closed.

[0078] Step S126: Perform the operation of closing the value in the first interval, and drive the motor to reduce torque to simulate the wheel entering the third landing state.

[0079] After the vehicle completes its initial airborne phase, the initial landing phase, the final landing phase, the second airborne phase with the wheels just leaving the ground, and the final airborne phase, the vehicle enters a third landing state. This third landing state is the initial landing phase, where the wheels are just making contact with the ground. When the vehicle enters this third landing state, the deactivation threshold needs to be adjusted to fall within the first range. This third landing state corresponds to the deactivation of the ABS system.

[0080] Step S127: Release the control of the brake disc.

[0081] After the vehicle simulation completes steps S121 to S126, the vehicle speed has gradually decreased. During the entire vehicle's airborne process, the stage from steps S121 to S126 is the most prone to overcurrent. After these steps, the probability of overcurrent is greatly reduced. Therefore, after step S126, the control of the brake disc can be released, and the pressure on the brake disc can be adjusted to 0; or, after step S126, the operations of steps S123 to S126 can be repeated until the vehicle speed drops to the set range or the vehicle stops, so as to completely record the changes of various vehicle parameters throughout the entire process.

[0082] In the embodiment, when performing any of the operations in steps S123 to S126, each step involves changing the brake disc closing value. In each step, the brake disc closing value is changed to the correct position within a preset time, which is no more than 100ms.

[0083] In step S130, during the execution of the simulated current overcurrent operation, relevant parameters are measured synchronously to optimize the vehicle's control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature.

[0084] When performing step S120, relevant parameters need to be measured simultaneously to facilitate data collection and subsequent judgment on whether there is a risk of motor overcurrent during the simulated current overcurrent operation, thus achieving the effect of collecting relevant parameters through the simulation device alone.

[0085] The solution proposed in this application simulates the changes in vehicle driving state caused by a vehicle crossing a speed bump and / or skidding, thereby obtaining relevant parameters of the vehicle during the airborne process. Measuring these parameters facilitates their integration into the MCU software, allowing for analysis to determine adjustments to control parameters and reducing the probability of motor overcurrent faults when the vehicle is airborne again. This application can collect relevant parameters using a simulation device, which simplifies the parameter collection process, reduces costs, and improves the safety of parameter acquisition compared to existing methods that rely on on-road testing.

[0086] Specifically, this application only involves simulating the vehicle driving state corresponding to current overcurrent and collecting relevant parameters, and does not involve the specific optimization process of the control parameters. The specific optimization method of the control parameters is not within the scope of protection of this application.

[0087] In this embodiment, the ABS system is triggered every time the wheel is airborne, and the corresponding operations are steps S121 and S125.

[0088] In one embodiment of this application, before releasing the control of the brake disc, the method further includes cyclically executing the steps of the simulated wheel entering a second ground state, the simulated wheel entering a second air state, the simulated wheel entering a third air state, and the simulated wheel entering a third ground state.

[0089] After completing steps S121 to S126, the vehicle speed has decreased compared to step S121. However, in the actual operation of the simulated vehicle, the vehicle will not stop directly and may still perform multiple take-off and landing actions. Therefore, in the simulation method of this application, the operation of steps S123 to S126 can be executed repeatedly to simulate the multiple take-off and landing situations of the vehicle, thereby collecting more complete relevant parameters.

[0090] In one embodiment of this application, the operation of executing the closing value in the first interval includes: executing the operation of the brake disc closing value between 30% and 70%.

[0091] Specifically, by setting the first range to 30%-70%, when the vehicle is in the first landing state, the second airborne state, or the third landing state, the corresponding brake disc closing value is within the range of 30%-70%.

[0092] In one embodiment of this application, the simulation method includes: cyclically executing the operation of simulating current overcurrent, wherein each time the operation of simulating current overcurrent is executed, the drive motor corresponds to a different output speed.

[0093] In this embodiment, after the simulation device is installed, S120 needs to be executed multiple times to simulate the situation of the vehicle passing over speed bumps and / or the vehicle slipping at different drive motor speeds. To cover the speed range of various vehicles, the initial speed of the drive motor can be 1000 rpm when the vehicle executes S120 for the first time; the initial speed of the drive motor can be 2000 rpm when the vehicle executes S120 for the second time; when S120 is executed sequentially, the speed is assigned in an incremental manner; in addition, S120 is executed at least twice to ensure the amount of data of the relevant parameters measured.

[0094] In one embodiment of this application, during the step of performing the simulated overcurrent operation, relevant parameters are measured synchronously, including DC bus voltage, motor output torque, motor speed, and hardware damage level.

[0095] Measuring relevant parameters facilitates subsequent data analysis and processing, enabling adjustments to vehicle control parameters to prevent future overcurrent incidents.

[0096] In the embodiments, relevant parameters may include, for example, the DC bus voltage and current of the drive motor; the torque and speed of the drive motor; the winding temperature of the drive motor; the fault list parameters of the drive motor; and other specially defined measurement parameters.

[0097] In one embodiment of this application, the step of performing the simulated current overcurrent operation, specifically step S120, further includes determining the operating state of the simulation device, including:

[0098] If any of the current, temperature, or hardware damage exceeds its corresponding preset range, the simulation device will shut down.

[0099] Since current, temperature, and hardware damage level affect the safety and operational sustainability of the simulation device, corresponding preset ranges are set for these three factors. When the current, temperature, and hardware damage level exceed the corresponding preset ranges, the device is immediately shut down to protect it. At the same time, the relevant parameters at the time of shutdown are recorded so that the control parameters can be adjusted later, thereby reducing the likelihood of the current, temperature, and hardware damage level exceeding the corresponding preset ranges in this embodiment.

[0100] In one embodiment of this application, see Figure 3 The simulation device includes a test bench. Before the step of performing the simulated current overcurrent operation according to the adjustment of the brake disc closing value, that is, before performing step S120, the simulation device is also pre-set.

[0101] Step S110: Pre-set the simulation device.

[0102] Before proceeding to step S120, the simulation device needs to be pre-configured, that is, the installation and pre-setting of the simulation device need to be completed.

[0103] Step S111: Install the platform.

[0104] In this embodiment, the test bench is installed, the drive motor is installed on the test bench, the high-voltage wiring harness and low-voltage wiring harness between the drive motor and the controller are connected, the cooling water pipe is connected, and the cooling flow rate (12L / min) and cooling water temperature (65℃) are set according to the actual operating status of the vehicle.

[0105] Under normal circumstances, the drive motor is set to torque loop, the dynamometer is set to speed loop, and the drive motor is set to operate in power-fed mode. The drive motor fixture is fixed on the test bench, and the braking system and dynamometer are connected. The DC bus voltage of the motor controller is set to the rated voltage of the drive motor, the rated operating speed, and the motor is operated at its rated output torque. Here, whether the drive motor is under no-load or load conditions is not considered.

[0106] Step S112: Establish communication between the test bench and the drive motor.

[0107] The test bench is connected to the drive motor so that the control system can control the drive motor, thereby making the drive motor operate according to the set simulation method.

[0108] In this embodiment, there are two control schemes for the braking system: Scheme 1, using a bench device to simulate the voltage signal of the brake pedal and adjust the braking percentage to control the hydraulic brake pump or electromagnetic brake pump, with a control signal accuracy of ≤10ms; Scheme 2, using a CANoe device to simulate sending relevant control messages, using a 10ms switching signal to simulate the opening and closing time of the braking signal, which requires the vehicle-side VCU controller and related wiring harnesses for the control of the braking system.

[0109] Step S113: Set up the simulation device according to the corresponding test conditions.

[0110] In this embodiment, the pre-setting of the simulation device may also include setting the experimental environment, such as ensuring that the altitude does not exceed 1000 meters, the air pressure is between 86 kPa and 106 kPa, the indoor temperature is 23℃ ± 5℃, and the humidity is between 10% and 90%. Before conducting the simulation experiment, the simulation device must be placed in the experimental environment for at least one hour to ensure that the temperature difference between the simulation device and the ambient temperature does not exceed 2K. Furthermore, the coolant flow rate should meet the actual flow requirements of the vehicle, and the coolant quantity should meet the actual oil quantity requirements of the vehicle.

[0111] In one embodiment of this application, the simulation method further includes:

[0112] In step S140, the motor is controlled to execute an energy recovery command based on the applied negative torque, and a simulated current overcurrent operation is performed.

[0113] In the embodiment, when simulating the operation of vehicle energy recovery, a negative torque is given through the test bench, that is, a negative torque is given to the dynamometer, and the drive motor is driven by the dynamometer to run in reverse, and the operation of simulating current overcurrent is repeatedly executed (step S120). The number of times step S120 is repeated is 10 sets, and each set contains 10 simulation tests.

[0114] It should be understood that, although Figure 1 , Figure 2 and Figure 3 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise explicitly stated herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0115] In one embodiment of this application, see Figure 5 The present invention also provides a simulation device for phase current overcurrent, used to simulate current overcurrent occurring under a set scenario. The simulation device includes a brake disc control module 210, a data acquisition module 220, and a drive motor control module 230, wherein:

[0116] The brake disc control module 210 performs a simulated current overcurrent operation based on the adjustment of the brake disc's shut-off value.

[0117] The operation of performing simulated current overcurrent includes:

[0118] Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state;

[0119] Perform the operation with the closing value in the first interval to simulate the wheel entering its first landing state;

[0120] Perform an operation with a value of 0 to simulate the wheel entering a second landing state;

[0121] Perform the operation with the closing value in the first interval to simulate the wheel entering the second airborne state;

[0122] Perform an operation with a 100% off value to simulate the wheel entering the third airborne state;

[0123] Perform the operation with the value in the first interval to simulate the wheel entering the third landing state;

[0124] Release control of the brake disc;

[0125] The acquisition module 220 is used to synchronously measure relevant parameters during the step of performing the simulated current overcurrent operation, so as to optimize the vehicle control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0126] The drive motor control module 230 is used to control the drive motor to reduce torque when the simulated wheel enters the first air state, the simulated wheel enters the first ground state, the simulated wheel enters the second air state, the simulated wheel enters the third air state, and the simulated wheel enters the third ground state.

[0127] In one embodiment of this application, the present invention also provides a computer device, which may also be a terminal, and its internal structure diagram may be as follows. Figure 4As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface is used to communicate with external terminals via a network connection. The computer program is executed by the processor to implement a method for controlling sunshades on vehicle windows. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device casing, or an external keyboard, touchpad, or mouse.

[0128] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0129] In one embodiment of this application, the present invention also provides an electronic device, see [link to relevant documentation]. Figure 6 The system includes a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor executes the program to perform the following steps:

[0130] Based on the adjustment of the brake disc's closing value, a simulated current overcurrent operation is performed;

[0131] In performing the step of performing the simulated current overcurrent operation, relevant parameters are measured synchronously to optimize the vehicle's control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0132] The operation of performing simulated current overcurrent includes:

[0133] Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state;

[0134] Perform the operation with the closing value in the first interval to simulate the wheel entering its first landing state;

[0135] Perform an operation with a value of 0 to simulate the wheel entering a second landing state;

[0136] Perform the operation with the closing value in the first interval to simulate the wheel entering the second airborne state;

[0137] Perform an operation with a 100% off value to simulate the wheel entering the third airborne state;

[0138] Perform the operation with the value in the first interval to simulate the wheel entering the third landing state;

[0139] Release control of the brake disc;

[0140] Specifically, when the simulated wheel enters the first airborne state, the simulated wheel enters the first grounded state, the simulated wheel enters the second airborne state, the simulated wheel enters the third airborne state, and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

[0141] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0142] Before releasing control of the brake disc, the following steps are also included:

[0143] The steps of the simulated wheel entering the second landing state, the simulated wheel entering the second airborne state, the simulated wheel entering the third airborne state, and the simulated wheel entering the third landing state are executed in a loop.

[0144] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0145] The operation of setting the closing value to the first interval includes:

[0146] Perform the operation with the brake disc closed between 30% and 70%.

[0147] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0148] The simulation method includes:

[0149] The operation of simulating current overcurrent is executed cyclically, and the drive motor outputs a different speed each time the operation of simulating current overcurrent is executed.

[0150] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0151] In the step of performing the simulated current overcurrent operation, during the synchronous measurement of relevant parameters, the relevant parameters also include:

[0152] The DC bus voltage, motor output torque, and motor speed are measured, along with the degree of hardware damage.

[0153] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0154] The step of performing the simulated current overcurrent operation further includes determining the operating status of the simulation device, including:

[0155] If any of the current, temperature, or hardware damage exceeds its corresponding preset range, the simulation device will shut down.

[0156] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0157] The simulation device includes a test bench, and before the step of performing the simulated current overcurrent operation according to the adjustment of the brake disc closing value, the simulation device is also pre-set.

[0158] The pre-setting of the simulation device includes:

[0159] Install the aforementioned stand;

[0160] Establish communication between the test bench and the drive motor;

[0161] The simulation device is set up according to the corresponding test conditions.

[0162] In one embodiment of this application, the processor further performs the following steps when executing the computer program:

[0163] The simulation method further includes:

[0164] The motor is controlled by an applied negative torque to perform energy recovery commands and simulate current overcurrent operations.

[0165] In one embodiment of this application, a simulation device is provided for performing a simulation method. The simulation device includes a drive motor, a brake disc, a dynamometer, a torque damper, and a control frame.

[0166] The drive motor includes two output ends, each of which is connected to the dynamometer via a connecting fixture. The connecting fixture includes a torque damper, a flange end, and a flywheel end.

[0167] The brake disc is connected to the connecting fixture, and a master cylinder is also connected between the two brake discs;

[0168] The drive motor is also connected to a water chiller, a cooling oil tank, and an MCU.

[0169] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned computer-readable storage medium can be a non-transitory computer-readable storage medium, including: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, and other media capable of storing program code; it can also be a transient computer-readable storage medium.

[0170] Those skilled in the art will recognize that this invention can be implemented as a system, method, or computer program product. Therefore, this disclosure can be embodied in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, the invention can also be implemented as a computer program product contained in one or more computer-readable media, which contains computer-readable program code. Computer-readable storage media can be, for example, but not limited to—electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof.

[0171] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0172] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for simulating phase current overcurrent in a vehicle motor, characterized in that, This device is used to simulate overcurrent situations occurring in a given scenario using a simulation apparatus. The simulation apparatus includes a drive motor and a brake disc, and the simulation method includes: Based on the adjustment of the brake disc's closing value, a simulated current overcurrent operation is performed; In performing the step of performing the simulated current overcurrent operation, relevant parameters are measured synchronously to optimize the vehicle's control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature; The operation of performing simulated current overcurrent includes: Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering its first landing state; Perform an operation with a value of 0 to simulate the wheel entering a second landing state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering a second airborne state; Perform an operation with the value of 100% off to simulate the wheel entering the third airborne state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering the third landing state; Release control of the brake disc; Specifically, when the simulated wheel enters the first airborne state, the simulated wheel enters the first grounded state, the simulated wheel enters the second airborne state, the simulated wheel enters the third airborne state, and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

2. The simulation method according to claim 1, characterized in that, Before releasing control of the brake disc, the following steps are also included: The steps of the simulated wheel entering the second landing state, the simulated wheel entering the second airborne state, the simulated wheel entering the third airborne state, and the simulated wheel entering the third landing state are executed in a loop.

3. The simulation method according to claim 1, characterized in that, The simulation method includes: The operation of simulating current overcurrent is executed cyclically, and the drive motor outputs a different speed each time the operation of simulating current overcurrent is executed.

4. The simulation method according to claim 1, characterized in that, In the step of performing the simulated current overcurrent operation, during the synchronous measurement of relevant parameters, the relevant parameters also include: The DC bus voltage, motor output torque, and motor speed are measured, along with the degree of hardware damage.

5. The simulation method according to claim 4, characterized in that, The step of performing the simulated current overcurrent operation further includes determining the operating status of the simulation device, including: If any of the current, temperature, or hardware damage exceeds its corresponding preset range, the simulation device will shut down.

6. The simulation method according to claim 1, characterized in that, The simulation device includes a test bench, and before the step of performing the simulated current overcurrent operation according to the adjustment of the brake disc closing value, the simulation device is also pre-set. The pre-setting of the simulation device includes: Install the aforementioned stand; Establish communication between the test bench and the drive motor; The simulation device is set up according to the corresponding test conditions.

7. The simulation method according to claim 1, characterized in that, The simulation method further includes: The motor is controlled by an applied negative torque to perform energy recovery commands and simulate current overcurrent operations.

8. A device for simulating phase current overcurrent, characterized in that, The simulation device is used to simulate overcurrent situations occurring under specified scenarios. The brake disc control module performs simulated current overcurrent operation based on the adjustment of the brake disc's shut-off value; The operation of performing simulated current overcurrent includes: Perform operations with the shutdown value ranging from 0 to 100% to simulate the wheel entering its first airborne state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering its first landing state; Perform an operation with a value of 0 to simulate the wheel entering a second landing state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering a second airborne state; Perform an operation with the value of 100% off to simulate the wheel entering the third airborne state; Perform the operation with the brake disc closed between 30% and 70% to simulate the wheel entering the third landing state; Release control of the brake disc; The acquisition module is used to synchronously measure relevant parameters during the step of performing the simulated current overcurrent operation, so as to optimize the vehicle control parameters based on the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature; The drive motor control module is used to control the drive motor to reduce torque when the simulated wheel enters the first airborne state, the simulated wheel enters the first grounded state, the simulated wheel enters the second airborne state, the simulated wheel enters the third airborne state, and the simulated wheel enters the third grounded state.

9. An electronic device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that, When the processor executes the program, it implements the steps of the simulation method as described in any one of claims 1 to 7.

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